Disclaimer: Kingdom Hearts belongs to Disney Interactive and Square Enix. Kuroshitsuji (Black Butler) belongs to Yana Toboso. The later is only referenced, it is not an cross-over but an AU where cosplay is occurring.
Author's Note: This story is also on my AO3 account Fangirl_Shenanigans.
Terra couldn't believe that Ven had managed to talk him into going to an anime convention, let alone cosplaying. Terra was not exactly fond of large crowds and endless noise, but here he was sitting in a hotel being measured for whatever costume he would be forced to wear that weekend. The only thing he had demanded was the option to deny any cross-dressing. Ven had only agreed because Aqua had told the boy not to push his luck with Terra.
As long as I'm not cosplaying as a girl or anything 'showy' I might survive this place. Terra thought, more like prayed. Terra knew how to avoid the few fans he'd developed on accident on campus. The art history major sighed, cursing his good looks rather than blessing them. Terra knew he was handsome, but he did not like it being broadcast. Unfortunately, Aqua and Ven didn't seem to agree when they finally presented him with his outfit.
"Are you two out of your minds? I am NOT wearing that!"
"Terra, you promised as long as you weren't cross-dressing you would cosplay with us!" Ven whined in retaliation blocking the door from the larger male, knowing he was about to bolt. Aqua was much calmer about the situation. The only reason she'd agreed to doing this cosplay was that they would be a set of three characters from the same anime so they could chase off anyone that might make Terra very uncomfortable in the suit.
"Terra, it will be fine. I promise you will not be swarmed by other Ciel or Grell cosplayers. Ven and I are cosplaying them so that they know you're off limits. Now, wear the costume. That's an order."
Terra's violet-blue eyes widened, realization dawning on him as to just what Aqua tacked onto the end of her reassurance. Aqua had essentially said that she was his Ciel, his in this case mistress and better half. This brought an entirely different reaction than either of his best friends had expected as his mouth upturned slightly, eyes narrowed minutely as he lowered his voice an octave or so.
"Yes, my lord."
Author: This is a college AU that may or may not receive some more drabbles at at later time.